Find out more about the UK citizenship test This is the Home Office web site that provides all the information you will need to prepare for the test.
Are you eligible to get a British passport?
check here: https://www.gov.uk/british-passport-eligibility
Find more information on Dual nationality. Note some countries will require permission in the form of a letter, before an applicant can apply for citizenship. Failing this could result in the termination of your origination passport.
British Citizenship home page
This is the Home Office web site that provides all the information you will need
for becoming a British citizen.
How to apply for a British passport?
This Home Office web site provides all the information about applying for a new passport.
How to arrange a UK Citizenship ceremony?
What happens at a ceremony? How to arrange a ceremony? This Home Office web site will answer all these questions.
Immigration & Nationality Directorate
This website will help you understand UK Immigration control and what your rights and responsibilities are when you make an application.